Not sure about 30D...since I am not a canon user, but3 m0 R9 r8 c$ f5 ^4 n" E! n6 d
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... , C- ^% T! g9 ]1 i 7 o7 m% I& k7 DThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.